Two beams, … and …, of plane polarized light with mutually perpendicular planes of polarization are seen through a polaroid. From the position when the beam … has maximum intensity (and beam … has zero intensity), a rotation of polaroid through … makes the two beams appear equally bright. If the initial intensities of the two beams are … and … respectively, then … equals:

Option D. According to malus law, intensity of emerging beam is given by,

Wave Optics

JEE Main 2014 · Session, Shift 1 · Q8458

PhysicsMedium84×since 2003Q8458

Two beams,

A

and

B

, of plane polarized light with mutually perpendicular planes of polarization are seen through a polaroid. From the position when the beam

A

has maximum intensity (and beam

B

has zero intensity), a rotation of polaroid through

{30^ \circ }

makes the two beams appear equally bright. If the initial intensities of the two beams are

{{\rm I}_A}

and

{{\rm I}_B}

respectively, then

{{{{\rm I}_A}} \over {{{\rm I}_B}}}

equals:

Wave Optics — JEE Main 2014 · Session, Shift 1 · Q8458 · Alror